<?php
// +----------------------------------------------------------------------
// | 日期时间操作类
// +----------------------------------------------------------------------

class date {


	protected $date;  //日期的时间戳	
	protected $timezone;  //时区	
	protected $year; //年
	protected $month; //月
	protected $day; //日
	protected $hour; //时
	protected $minute; //分
	protected $second; //秒
	protected $weekday; //星期的数字表示
	protected $cWeekday; //星期的完整表示
	protected $yDay; //一年中的天数 0－365
	protected $cMonth; //月份的完整表示
	protected $CDATE; //日期CDATE表示
	protected $YMD; //日期的YMD表示
	protected $CTIME; //时间的输出表示
	protected $Week = array("日","一","二","三","四","五","六");

	/**
     +----------------------------------------------------------
     * 架构函数  创建一个Date对象
     +----------------------------------------------------------
     * @param mixed $date  日期
     +----------------------------------------------------------
     */
	public function __construct($date='')
	{
		//分析日期
		$this->date =   $this->parse($date);
		$this->setDate($this->date);
	}

	/**
     +----------------------------------------------------------
     * 日期分析  返回时间戳
     +----------------------------------------------------------
     * @param mixed $date 日期
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function parse($date)
	{
		if (is_numeric($date)) {
			//数字格式直接转换为时间戳
			$tmpdate = $date;

		} elseif (is_string($date)) {
			if (($date == "") || strtotime($date) == -1) {
				//为空默认取得当前时间戳
				$tmpdate = time();
			} else {
				//把字符串转换成UNIX时间戳
				$tmpdate = strtotime($date);
			}
		} elseif (is_null($date))  {
			//为空默认取得当前时间戳
			$tmpdate = time();

		} else {
			if (get_class($date) == "date") {
				//如果是Date对象
				$tmpdate = $date->date;
			} else {
				//默认取当前时间戳
				$tmpdate = time();
			}
		}

		return $tmpdate;
	}

	/**
     +----------------------------------------------------------
     * 验证日期数据是否有效
     +----------------------------------------------------------
     * @param mixed $date 日期数据
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function valid($date)
	{

	}


	/**
     +----------------------------------------------------------
     * 日期参数设置
     +----------------------------------------------------------
     * @param integer $date  日期时间戳
     +----------------------------------------------------------
     * @return void
     +----------------------------------------------------------
     */
	public function setDate($date)
	{
		$dateArray  =   getdate($date);
		$this->date         =   $dateArray[0];            //时间戳
		$this->second       =   $dateArray["seconds"];    //秒
		$this->minute       =   $dateArray["minutes"];    //分
		$this->hour         =   $dateArray["hours"];      //时
		$this->day          =   $dateArray["mday"];       //日
		$this->month        =   $dateArray["mon"];        //月
		$this->year         =   $dateArray["year"];       //年

		$this->weekday      =   $dateArray["wday"];       //星期 0～6
		$this->cWeekday     =   '星期'.$this->Week[$this->weekday];//$dateArray["weekday"];    //星期完整表示
		$this->yDay         =   $dateArray["yday"];       //一年中的天数 0－365
		$this->cMonth       =   $dateArray["month"];      //月份的完整表示

		$this->CDATE        =   $this->format("%Y-%m-%d");//日期表示
		$this->YMD          =   $this->format("%Y%m%d");  //简单日期
		$this->CTIME        =   $this->format("%H:%M:%S");//时间表示

		return ;
	}

	/**
     +----------------------------------------------------------
     * 日期格式化
     * 默认返回 1970-01-01 11:30:45 格式
     +----------------------------------------------------------
     * @param string $format  格式化参数
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function format($format = "%Y-%m-%d %H:%M:%S") {
		return strftime($format, $this->date);
	}

	/**
     +----------------------------------------------------------
     * 是否为闰年
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function isLeapYear($year='')
	{
		if(empty($year)) {
			$year = $this->year;
		}
		return ((($year % 4) == 0) && (($year % 100) != 0) || (($year % 400) == 0));
	}

	/**
     +----------------------------------------------------------
     * 计算日期差
     *
     *  w - weeks
     *  d - days
     *  h - hours
     *  m - minutes
     *  s - seconds
     +----------------------------------------------------------
     * @param mixed $date 要比较的日期
     * @param string $elaps  比较跨度
     +----------------------------------------------------------
     * @return integer
     +----------------------------------------------------------
     */
	public function dateDiff($date, $elaps = "d")
	{
		$__DAYS_PER_WEEK__       = (7);
		$__DAYS_PER_MONTH__       = (30);
		$__DAYS_PER_YEAR__       = (365);
		$__HOURS_IN_A_DAY__      = (24);
		$__MINUTES_IN_A_DAY__    = (1440);
		$__SECONDS_IN_A_DAY__    = (86400);
		//计算天数差
		$__DAYSELAPS = ($this->parse($date) - $this->date) / $__SECONDS_IN_A_DAY__ ;
		switch ($elaps) {
			case "y"://转换成年
			$__DAYSELAPS =  $__DAYSELAPS / $__DAYS_PER_YEAR__;
			break;
			case "M"://转换成月
			$__DAYSELAPS =  $__DAYSELAPS / $__DAYS_PER_MONTH__;
			break;
			case "w"://转换成星期
			$__DAYSELAPS =  $__DAYSELAPS / $__DAYS_PER_WEEK__;
			break;
			case "h"://转换成小时
			$__DAYSELAPS =  $__DAYSELAPS * $__HOURS_IN_A_DAY__;
			break;
			case "m"://转换成分钟
			$__DAYSELAPS =  $__DAYSELAPS * $__MINUTES_IN_A_DAY__;
			break;
			case "s"://转换成秒
			$__DAYSELAPS =  $__DAYSELAPS * $__SECONDS_IN_A_DAY__;
			break;
		}
		return $__DAYSELAPS;
	}

	/**
     +----------------------------------------------------------
     * 人性化的计算日期差
     +----------------------------------------------------------
     * @param mixed $time 要比较的时间
     * @param mixed $precision 返回的精度
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function timeDiff( $time ,$precision=false) {
		if(!is_numeric($precision) && !is_bool($precision)) {
			static $_diff = array('y'=>'年','M'=>'个月','d'=>'天','w'=>'周','s'=>'秒','h'=>'小时','m'=>'分钟');
			return ceil($this->dateDiff($time,$precision)).$_diff[$precision].'前';
		}
		$diff = abs($this->parse($time) - $this->date);
		static $chunks = array(array(31536000,'年'),array(2592000,'个月'),array(604800,'周'),array(86400,'天'),array(3600 ,'小时'),array(60,'分钟'),array(1,'秒'));
		$count =0;
		$since = '';
		for($i=0;$i<count($chunks);$i++) {
			if($diff>=$chunks[$i][0]) {
				$num   =  floor($diff/$chunks[$i][0]);
				$since .= sprintf('%d'.$chunks[$i][1],$num);
				$diff =  (int)($diff-$chunks[$i][0]*$num);
				$count++;
				if(!$precision || $count>=$precision) {
					break;
				}
			}
		}
		return $since.'前';
	}

	/**
     +----------------------------------------------------------
     * 计算月份的第一天  返回Date对象
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function firstDayOfMonth() {
		return (new Date(strftime("%Y-%m-%d", mktime(0, 0, 0,
		$this->month,
		1,
		$this->year ))));
	}

	/**
     +----------------------------------------------------------
     * 计算年份的第一天  返回Date对象
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function firstDayOfYear() {
		return (new Date(strftime("%Y-%m-%d", mktime(0, 0, 0,
		1,
		1,
		$this->year))));
	}

	/**
     +----------------------------------------------------------
     * 计算月份的最后一天  返回Date对象
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function lastDayOfMonth() {
		return (new Date(strftime("%Y-%m-%d", mktime(0, 0, 0,
		$this->month + 1,
		0,
		$this->year ))));
	}

	/**
     +----------------------------------------------------------
     * 计算年份的最后一天   返回Date对象
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function lastDayOfYear() {
		return (new Date(strftime("%Y-%m-%d", mktime(0, 0, 0,
		1,
		0,
		$this->year + 1))));
	}

	/**
     +----------------------------------------------------------
     * 计算月份的最大天数
     +----------------------------------------------------------
     * @return integer
     +----------------------------------------------------------
     */
	public function maxDayOfMonth()
	{
		$result = $this->dateDiff(strtotime($this->dateAdd(1,'m')),'d');
		return $result;
	}

	/**
     +----------------------------------------------------------
     * 取得指定间隔日期
     *
     *    yyyy - 年
     *    q    - 季度
     *    m    - 月
     *    y    - day of year
     *    d    - 日
     *    w    - 周
     *    ww   - week of year
     *    h    - 小时
     *    n    - 分钟
     *    s    - 秒
     +----------------------------------------------------------
     * @param integer $number 间隔数目
     * @param string $interval  比较类型
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function dateAdd($number = 0, $interval = "d")
	{
		$hours =  $this->hour;
		$minutes =  $this->minute;
		$seconds =  $this->second;
		$month =  $this->month;
		$day =  $this->day;
		$year =  $this->year;

		switch ($interval)
		{
			case "yyyy":
				//---Add $number to year
				$year += $number;
				break;

			case "q":
				//---Add $number to quarter
				$year += ($number*3);
				break;

			case "m":
				//---Add $number to month
				$month += $number;
				break;

			case "y":
			case "d":
			case "w":
				//---Add $number to day of year, day, day of week
				$day += $number;
				break;

			case "ww":
				//---Add $number to week
				$day += ($number*7);
				break;

			case "h":
				//---Add $number to hours
				$hours += $number;
				break;

			case "n":
				//---Add $number to minutes
				$minutes += $number;
				break;

			case "s":
				//---Add $number to seconds
				$seconds += $number;
				break;
		}

		return (new Date(mktime($hours,
		$minutes,
		$seconds,
		$month,
		$day,
		$year)));

	}

	/**
     +----------------------------------------------------------
     * 日期数字转中文  用于日和月、周
     +----------------------------------------------------------
     * @param integer $number 日期数字
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function  numberToCh($number)
	{
		$number = intval($number);
		$array  = array('一','二','三','四','五','六','七','八','九','十');
		$str = '';
		if($number  ==0)  { $str .= "十" ;}
		if($number  <  10){
			$str .= $array[$number-1] ;
		}
		elseif($number  <  20  ){
			$str .= "十".$array[$number-11];
		}
		elseif($number  <  30  ){
			$str .= "二十".$array[$number-21];
		}
		else{
			$str .= "三十".$array[$number-31];
		}
		return $str;
	}


	/**
     +----------------------------------------------------------
     * 年份数字转中文
     +----------------------------------------------------------
     * @param integer $yearStr 年份数字
     * @param boolean $flag 是否显示公元
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function  yearToCh( $yearStr ,$flag=false ){
		$array = array('零','一','二','三','四','五','六','七','八','九');
		$str = $flag? '公元' : '';
		for($i=0;$i<4;$i++){
			$str .= $array[substr($yearStr,$i,1)];
		}
		return $str;
	}

	/**
     +----------------------------------------------------------
     *  判断日期 所属 干支 生肖 星座
     *  type 参数：XZ 星座 GZ 干支 SX 生肖
     +----------------------------------------------------------
     * @param string $type  获取信息类型
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
	public function magicInfo($type)
	{
		$result = '';
		$m      =   $this->month;
		$y      =   $this->year;
		$d      =   $this->day;

		switch ($type)
		{
			case 'XZ'://星座
			$XZDict = array('摩羯','宝瓶','双鱼','白羊','金牛','双子','巨蟹','狮子','处女','天秤','天蝎','射手');
			$Zone   = array(1222,122,222,321,421,522,622,722,822,922,1022,1122,1222);
			if((100*$m+$d)>=$Zone[0]||(100*$m+$d)<$Zone[1])
			$i=0;
			else
			for($i=1;$i<12;$i++){
				if((100*$m+$d)>=$Zone[$i]&&(100*$m+$d)<$Zone[$i+1])
				break;
			}
			$result = $XZDict[$i].'座';
			break;

			case 'GZ'://干支
			$GZDict = array(
			array('甲','乙','丙','丁','戊','己','庚','辛','壬','癸'),
			array('子','丑','寅','卯','辰','巳','午','未','申','酉','戌','亥')
			);
			$i= $y -1900+36 ;
			$result = $GZDict[0][$i%10].$GZDict[1][$i%12];
			break;

			case 'SX'://生肖
			$SXDict = array('鼠','牛','虎','兔','龙','蛇','马','羊','猴','鸡','狗','猪');
			$result = $SXDict[($y-4)%12];
			break;

		}
		return $result;
	}


	public function __toString()
	{
		return $this->format();
	}
}
?>